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add parameter to choose algorithm for tsp calculation and remove redundant code

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This commit is contained in:
Chau Nguyen
2015-07-10 12:25:35 -04:00
committed by Huyen Chau Nguyen
parent b15f8f68e4
commit 6191b6bee2
9 changed files with 39 additions and 655 deletions
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plugins/round_trip.hpp
+26 -11
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@@ -158,9 +158,10 @@ template <class DataFacadeT> class RoundTripPlugin final : public BasePlugin
return 400;
}
//check if locations are in different strongly connected components (SCC)
const auto maxint = std::numeric_limits<int>::max();
if (*std::max_element(result_table->begin(), result_table->end()) == maxint) {
//run TSP computation for every SCC
std::unique_ptr<BaseDescriptor<DataFacadeT>> descriptor;
descriptor = osrm::make_unique<JSONDescriptor<DataFacadeT>>(facade);
descriptor->SetConfig(route_parameters);
@@ -170,35 +171,49 @@ template <class DataFacadeT> class RoundTripPlugin final : public BasePlugin
SplitUnaccessibleLocations(phantom_node_vector, *result_table, components);
auto number_of_locations = phantom_node_vector.size();
std::vector<int> min_loc_permutation(number_of_locations, -1);
auto min_dist = 0;
for(auto k = 0; k < components.size(); ++k) {
if (components[k].size() > 1) {
// Compute the TSP with the given algorithm
InternalRouteResult min_route;
osrm::tsp::FarthestInsertionTSP(components[k], phantom_node_vector, *result_table, min_route, min_loc_permutation);
if (route_parameters.tsp_algo == "BF" && route_parameters.coordinates.size() < 14) {
osrm::tsp::BruteForceTSP(components[k], phantom_node_vector, *result_table, min_route, min_loc_permutation);
} else if (route_parameters.tsp_algo == "NN") {
osrm::tsp::NearestNeighbourTSP(components[k], phantom_node_vector, *result_table, min_route, min_loc_permutation);
} else if (route_parameters.tsp_algo == "FI") {
osrm::tsp::FarthestInsertionTSP(components[k], phantom_node_vector, *result_table, min_route, min_loc_permutation);
} else{
osrm::tsp::FarthestInsertionTSP(components[k], phantom_node_vector, *result_table, min_route, min_loc_permutation);
}
search_engine_ptr->shortest_path(min_route.segment_end_coordinates, route_parameters.uturns, min_route);
min_dist += min_route.shortest_path_length;
descriptor->Run(min_route, json_result);
}
}
TIMER_STOP(tsp);
TIMER_STOP(tsp);
SetRuntimeOutput(TIMER_MSEC(tsp), json_result);
SetDistanceOutput(min_dist, json_result);
SetLocPermutationOutput(min_loc_permutation, json_result);
} else {
} else { //run TSP computation for all locations
auto number_of_locations = phantom_node_vector.size();
InternalRouteResult min_route;
std::vector<int> min_loc_permutation(number_of_locations, -1);
//######################## FARTHEST INSERTION ###############################//
// Compute the TSP with the given algorithm
TIMER_START(tsp);
osrm::tsp::FarthestInsertionTSP(phantom_node_vector, *result_table, min_route, min_loc_permutation);
if (route_parameters.tsp_algo == "BF" && route_parameters.coordinates.size() < 14) {
osrm::tsp::BruteForceTSP(phantom_node_vector, *result_table, min_route, min_loc_permutation);
} else if (route_parameters.tsp_algo == "NN") {
osrm::tsp::NearestNeighbourTSP(phantom_node_vector, *result_table, min_route, min_loc_permutation);
} else if (route_parameters.tsp_algo == "FI") {
osrm::tsp::FarthestInsertionTSP(phantom_node_vector, *result_table, min_route, min_loc_permutation);
} else {
osrm::tsp::FarthestInsertionTSP(phantom_node_vector, *result_table, min_route, min_loc_permutation);
}
search_engine_ptr->shortest_path(min_route.segment_end_coordinates, route_parameters.uturns, min_route);
TIMER_STOP(tsp);
// //######################### NEAREST NEIGHBOUR ###############################//
// TIMER_START(tsp);
// osrm::tsp::NearestNeighbourTSP(phantom_node_vector, *result_table, min_route, min_loc_permutation);
// search_engine_ptr->shortest_path(min_route.segment_end_coordinates, route_parameters.uturns, min_route);
// TIMER_STOP(tsp);
BOOST_ASSERT(min_route.segment_end_coordinates.size() == route_parameters.coordinates.size());
SetLocPermutationOutput(min_loc_permutation, json_result);
SetDistanceOutput(min_route.shortest_path_length, json_result);
plugins/round_trip_BF.hpp
-217
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@@ -1,217 +0,0 @@
/*
Copyright (c) 2015, Project OSRM contributors
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this list
of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this
list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef ROUND_TRIP_BF_HPP
#define ROUND_TRIP_BF_HPP
#include "plugin_base.hpp"
#include "../algorithms/object_encoder.hpp"
#include "../routing_algorithms/tsp_nearest_neighbour.hpp"
#include "../routing_algorithms/tsp_farthest_insertion.hpp"
#include "../routing_algorithms/tsp_brute_force.hpp"
#include "../data_structures/query_edge.hpp"
#include "../data_structures/search_engine.hpp"
#include "../descriptors/descriptor_base.hpp"
#include "../descriptors/json_descriptor.hpp"
#include "../util/json_renderer.hpp"
#include "../util/make_unique.hpp"
#include "../util/string_util.hpp"
#include "../util/timing_util.hpp"
#include "../util/simple_logger.hpp"
#include <osrm/json_container.hpp>
#include <cstdlib>
#include <algorithm>
#include <memory>
#include <unordered_map>
#include <string>
#include <vector>
#include <limits>
template <class DataFacadeT> class RoundTripPluginBF final : public BasePlugin
{
private:
std::string descriptor_string;
DataFacadeT *facade;
std::unique_ptr<SearchEngine<DataFacadeT>> search_engine_ptr;
public:
explicit RoundTripPluginBF(DataFacadeT *facade)
: descriptor_string("tripBF"), facade(facade)
{
search_engine_ptr = osrm::make_unique<SearchEngine<DataFacadeT>>(facade);
}
const std::string GetDescriptor() const override final { return descriptor_string; }
void GetPhantomNodes(const RouteParameters &route_parameters, PhantomNodeArray & phantom_node_vector) {
const bool checksum_OK = (route_parameters.check_sum == facade->GetCheckSum());
// find phantom nodes for all input coords
for (const auto i : osrm::irange<std::size_t>(0, route_parameters.coordinates.size())) {
// if client hints are helpful, encode hints
if (checksum_OK && i < route_parameters.hints.size() &&
!route_parameters.hints[i].empty()) {
PhantomNode current_phantom_node;
ObjectEncoder::DecodeFromBase64(route_parameters.hints[i], current_phantom_node);
if (current_phantom_node.is_valid(facade->GetNumberOfNodes()))
{
phantom_node_vector[i].emplace_back(std::move(current_phantom_node));
continue;
}
}
facade->IncrementalFindPhantomNodeForCoordinate(route_parameters.coordinates[i],
phantom_node_vector[i], 1);
if (phantom_node_vector[i].size() > 1) {
phantom_node_vector[i].erase(phantom_node_vector[i].begin());
}
BOOST_ASSERT(phantom_node_vector[i].front().is_valid(facade->GetNumberOfNodes()));
}
}
void SplitUnaccessibleLocations(PhantomNodeArray & phantom_node_vector,
std::vector<EdgeWeight> & result_table,
std::vector<std::vector<unsigned>> & components) {
// Run TarjanSCC
auto number_of_locations = phantom_node_vector.size();
auto wrapper = std::make_shared<MatrixGraphWrapper<EdgeWeight>>(result_table, number_of_locations);
auto empty_restriction = RestrictionMap(std::vector<TurnRestriction>());
auto empty_vector = std::vector<bool>();
auto scc = TarjanSCC<MatrixGraphWrapper<EdgeWeight>>(wrapper, empty_restriction, empty_vector);
scc.run();
for (int j = 0; j < scc.get_number_of_components(); ++j){
components.push_back(std::vector<unsigned>());
}
for (int i = 0; i < number_of_locations; ++i) {
components[scc.get_component_id(i)].push_back(i);
}
}
void SetLocPermutationOutput(const std::vector<int> & loc_permutation, osrm::json::Object & json_result){
osrm::json::Array json_loc_permutation;
json_loc_permutation.values.insert(json_loc_permutation.values.end(), loc_permutation.begin(), loc_permutation.end());
json_result.values["loc_permutation"] = json_loc_permutation;
}
void SetDistanceOutput(const int distance, osrm::json::Object & json_result) {
json_result.values["distance"] = distance;
}
void SetRuntimeOutput(const float runtime, osrm::json::Object & json_result) {
json_result.values["runtime"] = runtime;
}
void SetGeometry(const RouteParameters &route_parameters, const InternalRouteResult & min_route, osrm::json::Object & json_result) {
// return geometry result to json
std::unique_ptr<BaseDescriptor<DataFacadeT>> descriptor;
descriptor = osrm::make_unique<JSONDescriptor<DataFacadeT>>(facade);
descriptor->SetConfig(route_parameters);
descriptor->Run(min_route, json_result);
}
int HandleRequest(const RouteParameters &route_parameters,
osrm::json::Object &json_result) override final
{
// check if all inputs are coordinates
if (!check_all_coordinates(route_parameters.coordinates)) {
return 400;
}
PhantomNodeArray phantom_node_vector(route_parameters.coordinates.size());
GetPhantomNodes(route_parameters, phantom_node_vector);
// compute the distance table of all phantom nodes
const std::shared_ptr<std::vector<EdgeWeight>> result_table =
search_engine_ptr->distance_table(phantom_node_vector);
if (!result_table){
return 400;
}
if (route_parameters.coordinates.size() < 14) {
const auto maxint = std::numeric_limits<int>::max();
if (*std::max_element(result_table->begin(), result_table->end()) == maxint) {
std::unique_ptr<BaseDescriptor<DataFacadeT>> descriptor;
descriptor = osrm::make_unique<JSONDescriptor<DataFacadeT>>(facade);
descriptor->SetConfig(route_parameters);
std::vector<std::vector<unsigned>> components;
TIMER_START(tsp);
SplitUnaccessibleLocations(phantom_node_vector, *result_table, components);
std::vector<int> min_loc_permutation(phantom_node_vector.size(), -1);
auto min_dist = 0;
for(auto k = 0; k < components.size(); ++k) {
if (components[k].size() > 1) {
InternalRouteResult min_route;
//run nearest neighbour
osrm::tsp::BruteForceTSP(components[k], phantom_node_vector, *result_table, min_route, min_loc_permutation);
//compute route
search_engine_ptr->shortest_path(min_route.segment_end_coordinates, route_parameters.uturns, min_route);
//return geometry
min_dist += min_route.shortest_path_length;
descriptor->Run(min_route, json_result);
}
}
TIMER_STOP(tsp);
SetRuntimeOutput(TIMER_MSEC(tsp), json_result);
SetDistanceOutput(min_dist, json_result);
SetLocPermutationOutput(min_loc_permutation, json_result);
} else {
auto number_of_locations = phantom_node_vector.size();
InternalRouteResult min_route;
std::vector<int> min_loc_permutation(number_of_locations, -1);
//########################### BRUTE FORCE ####################################//
TIMER_START(tsp);
osrm::tsp::BruteForceTSP(phantom_node_vector, *result_table, min_route, min_loc_permutation);
search_engine_ptr->shortest_path(min_route.segment_end_coordinates, route_parameters.uturns, min_route);
TIMER_STOP(tsp);
BOOST_ASSERT(min_route.segment_end_coordinates.size() == route_parameters.coordinates.size());
SetLocPermutationOutput(min_loc_permutation, json_result);
SetDistanceOutput(min_route.shortest_path_length, json_result);
SetRuntimeOutput(TIMER_MSEC(tsp), json_result);
SetGeometry(route_parameters, min_route, json_result);
}
} else {
SetRuntimeOutput(-1, json_result);
SetDistanceOutput(-1, json_result);
}
return 200;
}
};
#endif // ROUND_TRIP_BF_HPP
plugins/round_trip_FI.hpp
-207
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@@ -1,207 +0,0 @@
/*
Copyright (c) 2015, Project OSRM contributors
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this list
of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this
list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef ROUND_TRIP_FI_HPP
#define ROUND_TRIP_FI_HPP
#include "plugin_base.hpp"
#include "../algorithms/object_encoder.hpp"
#include "../routing_algorithms/tsp_nearest_neighbour.hpp"
#include "../routing_algorithms/tsp_farthest_insertion.hpp"
#include "../routing_algorithms/tsp_brute_force.hpp"
#include "../data_structures/query_edge.hpp"
#include "../data_structures/search_engine.hpp"
#include "../descriptors/descriptor_base.hpp"
#include "../descriptors/json_descriptor.hpp"
#include "../util/json_renderer.hpp"
#include "../util/make_unique.hpp"
#include "../util/string_util.hpp"
#include "../util/timing_util.hpp"
#include "../util/simple_logger.hpp"
#include <osrm/json_container.hpp>
#include <cstdlib>
#include <algorithm>
#include <memory>
#include <unordered_map>
#include <string>
#include <vector>
#include <limits>
template <class DataFacadeT> class RoundTripPluginFI final : public BasePlugin
{
private:
std::string descriptor_string;
DataFacadeT *facade;
std::unique_ptr<SearchEngine<DataFacadeT>> search_engine_ptr;
public:
explicit RoundTripPluginFI(DataFacadeT *facade)
: descriptor_string("tripFI"), facade(facade)
{
search_engine_ptr = osrm::make_unique<SearchEngine<DataFacadeT>>(facade);
}
const std::string GetDescriptor() const override final { return descriptor_string; }
void GetPhantomNodes(const RouteParameters &route_parameters, PhantomNodeArray & phantom_node_vector) {
const bool checksum_OK = (route_parameters.check_sum == facade->GetCheckSum());
// find phantom nodes for all input coords
for (const auto i : osrm::irange<std::size_t>(0, route_parameters.coordinates.size())) {
// if client hints are helpful, encode hints
if (checksum_OK && i < route_parameters.hints.size() &&
!route_parameters.hints[i].empty()) {
PhantomNode current_phantom_node;
ObjectEncoder::DecodeFromBase64(route_parameters.hints[i], current_phantom_node);
if (current_phantom_node.is_valid(facade->GetNumberOfNodes()))
{
phantom_node_vector[i].emplace_back(std::move(current_phantom_node));
continue;
}
}
facade->IncrementalFindPhantomNodeForCoordinate(route_parameters.coordinates[i],
phantom_node_vector[i], 1);
if (phantom_node_vector[i].size() > 1) {
phantom_node_vector[i].erase(phantom_node_vector[i].begin());
}
BOOST_ASSERT(phantom_node_vector[i].front().is_valid(facade->GetNumberOfNodes()));
}
}
void SplitUnaccessibleLocations(PhantomNodeArray & phantom_node_vector,
std::vector<EdgeWeight> & result_table,
std::vector<std::vector<unsigned>> & components) {
// Run TarjanSCC
auto number_of_locations = phantom_node_vector.size();
auto wrapper = std::make_shared<MatrixGraphWrapper<EdgeWeight>>(result_table, number_of_locations);
auto empty_restriction = RestrictionMap(std::vector<TurnRestriction>());
auto empty_vector = std::vector<bool>();
auto scc = TarjanSCC<MatrixGraphWrapper<EdgeWeight>>(wrapper, empty_restriction, empty_vector);
scc.run();
for (int j = 0; j < scc.get_number_of_components(); ++j){
components.push_back(std::vector<unsigned>());
}
for (int i = 0; i < number_of_locations; ++i) {
components[scc.get_component_id(i)].push_back(i);
}
}
void SetLocPermutationOutput(const std::vector<int> & loc_permutation, osrm::json::Object & json_result){
osrm::json::Array json_loc_permutation;
json_loc_permutation.values.insert(json_loc_permutation.values.end(), loc_permutation.begin(), loc_permutation.end());
json_result.values["loc_permutation"] = json_loc_permutation;
}
void SetDistanceOutput(const int distance, osrm::json::Object & json_result) {
json_result.values["distance"] = distance;
}
void SetRuntimeOutput(const float runtime, osrm::json::Object & json_result) {
json_result.values["runtime"] = runtime;
}
void SetGeometry(const RouteParameters &route_parameters, const InternalRouteResult & min_route, osrm::json::Object & json_result) {
// return geometry result to json
std::unique_ptr<BaseDescriptor<DataFacadeT>> descriptor;
descriptor = osrm::make_unique<JSONDescriptor<DataFacadeT>>(facade);
descriptor->SetConfig(route_parameters);
descriptor->Run(min_route, json_result);
}
int HandleRequest(const RouteParameters &route_parameters,
osrm::json::Object &json_result) override final
{
// check if all inputs are coordinates
if (!check_all_coordinates(route_parameters.coordinates)) {
return 400;
}
PhantomNodeArray phantom_node_vector(route_parameters.coordinates.size());
GetPhantomNodes(route_parameters, phantom_node_vector);
// compute the distance table of all phantom nodes
const std::shared_ptr<std::vector<EdgeWeight>> result_table =
search_engine_ptr->distance_table(phantom_node_vector);
if (!result_table){
return 400;
}
const auto maxint = std::numeric_limits<int>::max();
if (*std::max_element(result_table->begin(), result_table->end()) == maxint) {
std::unique_ptr<BaseDescriptor<DataFacadeT>> descriptor;
descriptor = osrm::make_unique<JSONDescriptor<DataFacadeT>>(facade);
descriptor->SetConfig(route_parameters);
std::vector<std::vector<unsigned>> components;
TIMER_START(tsp);
SplitUnaccessibleLocations(phantom_node_vector, *result_table, components);
auto number_of_locations = phantom_node_vector.size();
std::vector<int> min_loc_permutation(number_of_locations, -1);
auto min_dist = 0;
for(auto k = 0; k < components.size(); ++k) {
if (components[k].size() > 1) {
InternalRouteResult min_route;
osrm::tsp::FarthestInsertionTSP(components[k], phantom_node_vector, *result_table, min_route, min_loc_permutation);
search_engine_ptr->shortest_path(min_route.segment_end_coordinates, route_parameters.uturns, min_route);
min_dist += min_route.shortest_path_length;
descriptor->Run(min_route, json_result);
}
}
TIMER_STOP(tsp);
SetRuntimeOutput(TIMER_MSEC(tsp), json_result);
SetDistanceOutput(min_dist, json_result);
SetLocPermutationOutput(min_loc_permutation, json_result);
} else {
auto number_of_locations = phantom_node_vector.size();
InternalRouteResult min_route;
std::vector<int> min_loc_permutation(number_of_locations, -1);
//######################## FARTHEST INSERTION ###############################//
TIMER_START(tsp);
osrm::tsp::FarthestInsertionTSP(phantom_node_vector, *result_table, min_route, min_loc_permutation);
search_engine_ptr->shortest_path(min_route.segment_end_coordinates, route_parameters.uturns, min_route);
TIMER_STOP(tsp);
BOOST_ASSERT(min_route.segment_end_coordinates.size() == route_parameters.coordinates.size());
SetLocPermutationOutput(min_loc_permutation, json_result);
SetDistanceOutput(min_route.shortest_path_length, json_result);
SetRuntimeOutput(TIMER_MSEC(tsp), json_result);
SetGeometry(route_parameters, min_route, json_result);
}
return 200;
}
};
#endif // ROUND_TRIP_FI_HPP
plugins/round_trip_NN.hpp
-211
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@@ -1,211 +0,0 @@
/*
Copyright (c) 2015, Project OSRM contributors
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this list
of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this
list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef ROUND_TRIP_NN_HPP
#define ROUND_TRIP_NN_HPP
#include "plugin_base.hpp"
#include "../algorithms/object_encoder.hpp"
#include "../routing_algorithms/tsp_nearest_neighbour.hpp"
#include "../routing_algorithms/tsp_farthest_insertion.hpp"
#include "../routing_algorithms/tsp_brute_force.hpp"
#include "../data_structures/query_edge.hpp"
#include "../data_structures/search_engine.hpp"
#include "../descriptors/descriptor_base.hpp"
#include "../descriptors/json_descriptor.hpp"
#include "../util/json_renderer.hpp"
#include "../util/make_unique.hpp"
#include "../util/string_util.hpp"
#include "../util/timing_util.hpp"
#include "../util/simple_logger.hpp"
#include "../tools/tsp_logs.hpp"
#include <osrm/json_container.hpp>
#include <cstdlib>
#include <algorithm>
#include <memory>
#include <unordered_map>
#include <string>
#include <vector>
#include <limits>
template <class DataFacadeT> class RoundTripPluginNN final : public BasePlugin
{
private:
std::string descriptor_string;
DataFacadeT *facade;
std::unique_ptr<SearchEngine<DataFacadeT>> search_engine_ptr;
public:
explicit RoundTripPluginNN(DataFacadeT *facade)
: descriptor_string("tripNN"), facade(facade)
{
search_engine_ptr = osrm::make_unique<SearchEngine<DataFacadeT>>(facade);
}
const std::string GetDescriptor() const override final { return descriptor_string; }
void GetPhantomNodes(const RouteParameters &route_parameters, PhantomNodeArray & phantom_node_vector) {
const bool checksum_OK = (route_parameters.check_sum == facade->GetCheckSum());
// find phantom nodes for all input coords
for (const auto i : osrm::irange<std::size_t>(0, route_parameters.coordinates.size())) {
// if client hints are helpful, encode hints
if (checksum_OK && i < route_parameters.hints.size() &&
!route_parameters.hints[i].empty()) {
PhantomNode current_phantom_node;
ObjectEncoder::DecodeFromBase64(route_parameters.hints[i], current_phantom_node);
if (current_phantom_node.is_valid(facade->GetNumberOfNodes()))
{
phantom_node_vector[i].emplace_back(std::move(current_phantom_node));
continue;
}
}
facade->IncrementalFindPhantomNodeForCoordinate(route_parameters.coordinates[i],
phantom_node_vector[i], 1);
if (phantom_node_vector[i].size() > 1) {
phantom_node_vector[i].erase(phantom_node_vector[i].begin());
}
BOOST_ASSERT(phantom_node_vector[i].front().is_valid(facade->GetNumberOfNodes()));
}
}
void SplitUnaccessibleLocations(PhantomNodeArray & phantom_node_vector,
std::vector<EdgeWeight> & result_table,
std::vector<std::vector<unsigned>> & components) {
// Run TarjanSCC
auto number_of_locations = phantom_node_vector.size();
auto wrapper = std::make_shared<MatrixGraphWrapper<EdgeWeight>>(result_table, number_of_locations);
auto empty_restriction = RestrictionMap(std::vector<TurnRestriction>());
auto empty_vector = std::vector<bool>();
auto scc = TarjanSCC<MatrixGraphWrapper<EdgeWeight>>(wrapper, empty_restriction, empty_vector);
scc.run();
for (int j = 0; j < scc.get_number_of_components(); ++j){
components.push_back(std::vector<unsigned>());
}
for (int i = 0; i < number_of_locations; ++i) {
components[scc.get_component_id(i)].push_back(i);
}
}
void SetLocPermutationOutput(const std::vector<int> & loc_permutation, osrm::json::Object & json_result){
osrm::json::Array json_loc_permutation;
json_loc_permutation.values.insert(json_loc_permutation.values.end(), loc_permutation.begin(), loc_permutation.end());
json_result.values["loc_permutation"] = json_loc_permutation;
}
void SetDistanceOutput(const int distance, osrm::json::Object & json_result) {
json_result.values["distance"] = distance;
}
void SetRuntimeOutput(const float runtime, osrm::json::Object & json_result) {
json_result.values["runtime"] = runtime;
}
void SetGeometry(const RouteParameters &route_parameters, const InternalRouteResult & min_route, osrm::json::Object & json_result) {
// return geometry result to json
std::unique_ptr<BaseDescriptor<DataFacadeT>> descriptor;
descriptor = osrm::make_unique<JSONDescriptor<DataFacadeT>>(facade);
descriptor->SetConfig(route_parameters);
descriptor->Run(min_route, json_result);
}
int HandleRequest(const RouteParameters &route_parameters,
osrm::json::Object &json_result) override final
{
// check if all inputs are coordinates
if (!check_all_coordinates(route_parameters.coordinates)) {
return 400;
}
PhantomNodeArray phantom_node_vector(route_parameters.coordinates.size());
GetPhantomNodes(route_parameters, phantom_node_vector);
// compute the distance table of all phantom nodes
const std::shared_ptr<std::vector<EdgeWeight>> result_table =
search_engine_ptr->distance_table(phantom_node_vector);
if (!result_table){
return 400;
}
const auto maxint = std::numeric_limits<int>::max();
if (*std::max_element(result_table->begin(), result_table->end()) == maxint) {
std::unique_ptr<BaseDescriptor<DataFacadeT>> descriptor;
descriptor = osrm::make_unique<JSONDescriptor<DataFacadeT>>(facade);
descriptor->SetConfig(route_parameters);
std::vector<std::vector<unsigned>> components;
TIMER_START(tsp);
SplitUnaccessibleLocations(phantom_node_vector, *result_table, components);
std::vector<int> min_loc_permutation(phantom_node_vector.size(), -1);
auto min_dist = 0;
for(auto k = 0; k < components.size(); ++k) {
if (components[k].size() > 1) {
InternalRouteResult min_route;
//run nearest neighbour
osrm::tsp::NearestNeighbourTSP(components[k], phantom_node_vector, *result_table, min_route, min_loc_permutation);
//compute route
search_engine_ptr->shortest_path(min_route.segment_end_coordinates, route_parameters.uturns, min_route);
//return geometry
min_dist += min_route.shortest_path_length;
descriptor->Run(min_route, json_result);
}
}
TIMER_STOP(tsp);
SetRuntimeOutput(TIMER_MSEC(tsp), json_result);
SetDistanceOutput(min_dist, json_result);
SetLocPermutationOutput(min_loc_permutation, json_result);
} else {
auto number_of_locations = phantom_node_vector.size();
InternalRouteResult min_route;
std::vector<int> min_loc_permutation(number_of_locations, -1);
//######################### NEAREST NEIGHBOUR ###############################//
TIMER_START(tsp);
osrm::tsp::NearestNeighbourTSP(phantom_node_vector, *result_table, min_route, min_loc_permutation);
search_engine_ptr->shortest_path(min_route.segment_end_coordinates, route_parameters.uturns, min_route);
TIMER_STOP(tsp);
BOOST_ASSERT(min_route.segment_end_coordinates.size() == route_parameters.coordinates.size());
SetLocPermutationOutput(min_loc_permutation, json_result);
SetDistanceOutput(min_route.shortest_path_length, json_result);
SetRuntimeOutput(TIMER_MSEC(tsp), json_result);
SetGeometry(route_parameters, min_route, json_result);
}
return 200;
}
};
#endif // ROUND_TRIP_NN_HPP